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feat: add equality metamethods

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Erica Marigold 2024-04-01 22:35:55 +05:30
parent fd5e6973b0
commit d5508bc6d0
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1 changed files with 24 additions and 3 deletions
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27
lib/option.luau
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@ -21,17 +21,34 @@ function Option.new<T>(val: T?)
{
__index = Option,
__tostring = function<T>(self: Option<T>)
-- TODO: Return formatted enum variants too
if self._optValue == nil then
return `{self.typeId}::None`
else
return `{self.typeId}::Some({self._optValue})`
end
end,
__eq = function<T>(self: Option<T>, other: Option<T>): boolean
return self._optValue == other._optValue
end,
__lt = function<T>(self: Option<T>, other: Option<T>): boolean
if self:isSome() and other:isSome() then
-- FIXME: TypeError: Type T cannot be compared with < because it has no metatable
return (self._optValue :: T) < (other._optValue :: T)
end
return false
end,
__le = function<T>(self: Option<T>, other: Option<T>): boolean
if self:isSome() and other:isSome() then
-- FIXME: TypeError: Type T cannot be compared with <= because it has no metatable
return (self._optValue :: T) <= (other._optValue :: T)
end
return false
end,
}
-- TODO: Implement equality and arithmetic metamethods
-- TODO: Implement __iter, once iterators traits exist
)
end
@ -250,6 +267,10 @@ function Option.unzip<T, A, B>(self: Option<T>): (Option<A>, Option<B>)
return None(), None()
end
function Option.getInner<T>(self: Option<T>): T?
return self._optValue
end
return {
Option = Option,
Some = Some,